SQRT function

The SQRT numeric function returns the square root of a given number.

Syntax

Read syntax diagramSkip visual syntax diagramSQRT (source_number)

SQRT returns the square root of source_number. The parameter can be any built-in numeric data type. The result is a FLOAT. If the parameter is NULL, the result is NULL.

For example: 
SQRT(4)
returns 2E+1 
SQRT(2)
returns 1.414213562373095E+0 
SQRT(-1)
throws an exception.